Machine for winding field coils



Dec. 31, 1935. J. M. SLABEY 2,026,365

MACHINE FOR WINDING FIELD COILS Filed Oct. 15, 1928 s. Sheets-Sheet 1llllll lllllllllllllLlll I I I Inventor H V- I J M. Slabgy 9 his 0113Dec. 31, 1935. J. M, SLABEY 2,026,365

MACHINE FOR WINDING FIELD COILS 3 Sheets-Sheet 2 Filed Oct. 15, 1928byhls a'Hy MMMW Dec. 31', 1935.

J. M. SLABEY 2,026,365

MACHINE FOR WINDING FIELD COILS Filed 0013. 15, 1928 JosphMfilab y Ey/11S Cltf- 3 Sheets-Sheet 3 l atentecl Dec. 31 1935 UNITED STATESPATENT OFFICE Application October 13, 1928, Serial No. 312,328

4 Claims.

In commercially used machines for winding, by

power, field coils of dynamos, heretofore the guiding of the wire toform the coil has been performed almost always manually. This has beendone because no sufiiciently simple machine was known, that wasadaptable to the conditions existing in a plant where the manufacture ofmotors or generators was mainly for its own use and where the dynamosused by it were repaired by having the coils rewound. A manual guidingof the wire being wound is usually not satisfactory. Wire isparticularly hard to guide so that it will lay evenly. The tensionrequired cannot be given satisfactorily by manual strength, nor can thewire be guided manualy sufliciently accurately, or sufiicientlysteadily, and consequently the coils are likely either to have spacesbetween adjacent turns of wire or the turns of wire of the same layerare likely to overlap. If a mechanical tension is interposed between thereel and the coil being wound, handling of the wire to guide it is stilldifficult.

Machines for winding coils by power are on themarket in which the wireis manually guided to the mandrel on which it is wound. They consist,essentially, of a power driven shaft to which the mandrel on which thecoils are wound is attached and by which it is driven. With thesemachines is frequently used a tension device for the wire being wound.These machines frequently have a plurality of driving shafts thatrevolve at different speeds.

If the coil is wound unevenly either by leaving spaces between the turnsor by turns of the same layer riding over each other, the" machineordinarily has to be stopped, the wire unwound and rewound, becauseunless the layers lie evenly throughout, the likelihod that the coilwill short circuit and burn out is increased. An imperfection in onelayer or course affects usually several superimposed layers. In manualguiding of the wire of power driven machines, weariness of the operatoradds to the likelihood of defective winding.

My device is a simple and efficient machine for windings field coils ofelectric dynamos, both generators and motors, especially where work isnot on a very large scale.

The device dispenses entirely with necessity for any manual guidance ofthe wire. It has a positively moving mechanical guide, the move- -mentof which can nearly synchronize with the progress of the coil layer on'the' reel, the lateral movement of the wire guide relativelyto therotation of the reel being proportioned so that itwill feed positivelyand evenly the wire to the coil; the extent of the lateral movement ofthe guide at each revolution given to the coil being equal to theportion of the width of the coil occupied by a single turn of wire. Ican allow the Wire guide to be disengaged from its driving mechanism andadjusted manually to bring it opposite to any point of the coil. Thedriving mechanism for the guide may have a neutral point so that thereel can revolve without moving the wire guide, and reversing devicesare provided whereby the direction of the lateral movement of the wireguide can be reversed at any portion of the winding. My device can beused with a very strong tension, so as to tauten out any wire kinks,and, when well constructed and carefully run, can be adjusted and runwith great exact.- ness. My device, too, has provisions by which thelateral movement of the wire guide may be instantly stopped, and alsoprovisions by which easily, and without interfering with the rest of themechanism of the device. The entire device may be attached readily toany of the usual forms of core winders and, in fact, is illustrated asattached to a lathe. In fact it may be attached to any machine toolhaving a shaft that can be made to rotate conveniently at the requiredspeed and a support for the bracket and the carrier for the wire guidemechanism. It is convenient that the entire wire guide mechanism shouldbe capable of being removed without disturbing the mechanism thatcarries and rotates the core. In short it is convenient that a cheapmachine may be produced that is capable of use in connection withordinary machinery usually installed in large manufacturing plants usingelectrical motors and generators, that will be available to Wind burnedout coils, or coils otherwise requiring repairs, and save the troubleand expense of sending such machinery away for repair. The device mayalso, of course, be used where electrical machinery is manufactured.

Describing now the best embodiment of m device'of which I- am at presentawarez- V Fig. 1 is a plan view of my device. Fig. 2 is a side elevationof my device. Fig. 3 is a plan view of a. bracket for the swivellinghead and the bed plate of the head. Fig. 4 is; a fragment of a plan viewof the attachment devices for the reel and its shaft. Fig. 5 is a sideelevation of the wire guide and carriage showing the means for itslateral movement and adjustment. Fig. 6 is an elevation of the reversingdevices viewed from the side of the power winding device. Fig. 7 is anelevation of the devices for adjusting the driven pulley relatively tothe driving disc, and Fig. 8 is a section on the line 8, 8, of Fig. '7.

A power winder, I, is shown in fragment. Its particular form is not partof my invention. I have shown it in a standard form, in which a casingcovers the driving mechanism, through which casing project two powershafts, 2, 200 drivable at two different speeds, the shaft, 2; alonebeing in use. The shaft, I8, carrying and driving the reel, 62, issuitably attached to the drive shaft 2. The shaft, I8, drives also thedriving disc, I1, which very conveniently may be clamped against theshoulder.

The width of the reel, 62, and its position along the shaft, I8, may bearranged by spacing the flanges, I9, of the reel from each other.

The wire guide, 35, and its driving mechanism are carried on aswivelling head. I provide a support such as the bracket, 31, for thishead that may be carried by the casing of the winder, I, independentlyof the drive shaft, 2, but positioned conveniently for the operation ofthis driving mechanism. This bracket and the mechanism carried by it maybe removed by unfastening its attachments to the plate I; or themechanism supported by it may be removed by removing it from the pivot29. The entire removal of the head is very advantageous when a layer ofheavy wire is to be wound.

The bracket may have the boltholes 51, 51, 51, by which it may beattached to the casing of the winder I. By carrying the bracket 31, fromthis casing independently of the drive shaft 2, it and the partssupported by it can be removed readily from the winder withoutdisturbing the reel or the friction drive I1 by which the guidingmechanism is driven, thus allowing the reel and the coil on it to befree from all machinery that might make access to it less. free. This isoften a great advantage, for instance, when a portion of wire must bewrapped on or wound on by hand, insulation inserted and many otheroperations.

This head, 1'6, swivels on a pivot, 29. It carries standards containingbearings for the mechanism for driving the wire guide, 35. Thismechanism is driven from the driving disc, I1, and contains means foradjusting the ratiov of the speed of translation of the wire guide tothe speed of revolution of the reel, so that the movement of the wireguide will be accommodated to the different gauges of wire wound intocoils. It also contains reversing devices to reverse the direction ofthe movement of the wire guide, so that while the reel continuouslyrevolves, the coil will be built up from both directions. The devicealso comprises a clutching and unclutching mechanism that releases thedevices immediately connected to the wire guide.

In practice, I assemble thesemechanisms as follows:In the standards, 34,34, I mount the shaft, I3, which extends partly over the face of thedisc, I1, and carries, longitudinally adjustable thereon, along a keyway, I 4, the friction pulley, I6, which the swivelling of the head willbring against the face ofthe disc, I1, against which it is urged by thespring 39. The face of the disc, I1, and the circumference of thepulley,

I6, may be roughened or one of them covered with leather to increase thefriction between them. A

very convenient means for adjusting the pulley, I6, is a screw threadedspindle, 5, that is provided with a clasp, I5, loosely engaging aretainer, 56 moving with the pulley, I5. The screw threaded spindle, 5,is held in the clasp, I5, by collars, 5 5|, 52, and can turn in athreaded socket in a standard, 34. By turning the spindle, 5, thediameter of the circular path travelled by the pulley, IB, is adjusted,on the face of the disc, I1, and the speed of rotation of the shaft, 5,relatively to 10 the speed of rotation of the shaft, I8, is controlled.The entire head may be turned manually on the pivot 29 against thetension of the spring 39. A very slight manual movement will remove thewheel I5 from contact with the disc I1, thereby stopping the movement ofthe wire guide slot 0, which movement will instantly recommence themoment the touch of the hand is withdrawn. This function of the head isuseful in a number of ways, for instance, if the travel of the wireguide is a trifle too fast, a momentary stoppage will bring the wirelaid on the drum to the desired closeness. The adjustment of thefriction pulley I6 can most advantageously be made when it and the discl1 are not in contact.

The device I use in practice for the desired movement of translation ofthe wire guide, 35, is a spindle, 21, having bearings in which itrevolves in standards carried by the head, 10, and having a screw head,3, working in a threaded socket inthe carriage, 43, which runs on atrack, 28, and carries the wire guide, 35. This spindle, 21, isconnected up through the reversing mechanism that, in practice, is asfollows:-The spindle, 21, has the bevel gear, 24. The pair of connectedbevel gears, l2, I2, mounted on the sleeve, 25, and keyed to the shaft,I3, are separated from each other sufficiently so that only one of thegears, I2, will engage simultaneously with the gear, 24. In practice, Iseparate them enough that they will be positioned so that both can beout of gear with it. Such a spacing of the gears I2 will produce aclutching and unclutching mechanism, because with both bevel wheels I2free from the gear 24, the latter and the shaft 21, and consequently thearm 35, can remain stationary while the rest of the driving mechanism ismoving, and can be moved backward and forward independently of it. Asuitable shifting means is a slide, I8, having an ear, 33, engaging withthe sleeve, 25, moved by the lever, B, pivoted at 9. A good key' betweenthe sleeve, 25, and the shaft, 23, is formed by the slots, a, a, andpins, 26, 26. The varying thickness of the wire is provided for bymaking one arm of the wire guide 35, movable toward and away from theother (see Figs. 1 and 5 particularly). The spacing of the arms iseffected in practice by making one of the arms integral with thecarriage structure and providing the other with an ear 8D, in which thescrew 8|, seated in an ear 82, attached to the carriage 30 works.

When the machine is operated the pulley, I6, is adjusted by turning themilled head, 4, and the wire guide is positioned by placing both gears,66 I2, out of mesh with the gear, 24, and turning the head, 3|, untilthe wire guide, 35, is properly positioned. The wire passes through theslot c.

Theshifting of the gears, I2, I2, will reverse the movement of the wireguide. 70

I have described with particularity the mechanical details of thepreferred embodiment of my invention, but I do not limit myself thereto,and many changes can be made in this embodiment without departing frommy invention.

I claim.'-

1. In a machine for winding field coils, the

combination with a power driven shaft, a reel driven thereby, a drivingfriction pulley carried by said shaft, a bracket positioned at the sideof said reel, and supporting a head swivelling thereon, said headcarrying a track, a wire guide travelling upon said track, a shaftextending outward from said head toward the friction drive pulley, adriven frictional pulley engaging with said drive pulley, adjustablealong the shaft extending outward, and devices for converting themovement of rotation of said driving pulley into motion of translationof said wire guide.

2. In a machine for winding field coils, a winding assemblage comprisinga reel, a frictional driving pulley and a shaft on which said reel andfriction pulley are mounted, in combination with a wire guidingassemblage containing a swivelling head on which head are mounted ashaft carrying a friction driven wheel and an arm supporting a wireguideand means for laterally moving the wire guide, comprising a rotatingshaft, and a carriage for the wire guide moving on said arm, gears andgear shifting ported parts forming a single unit that is removable fromits support without disturbing the said winding assemblage.

3. In a machine for winding field coils having a power driven shaft anda reel driven thereby, 5 wire guiding and controlling mechanismcomprising a friction drive pulley carried by the shaft, a swivellinghead positioned at the side of the reel, said head carrying a track, awire guide travelling upon said track, a shaft extending outward andsidewise from said head and carrying a driven frictional pulley engagingwith and yieldingly urged toward said driving pulley and adjustablealong said outwardly extended winding shaft, and devices for convertingthe movement of rotation of said driving pulley into motion oftranslation of said wire guide.

4. A machine for winding field coils used in connection with anothermachine also driven 'by a power driven shaft therein, comprising a reeldriven by said shaft directly, a swivelling head positioned at the sideof said shaft, and supported fromv such machine, a track carried by saidhead and a wire guide travelling along said track, a friction drivepulley driven by said drive shaft, a driven frictional pulley engagingwith said driving pulley and adjustable radially of the same and devicesfor converting the movement of rotation of the driving pulley into amovement of translation of the wire guide.

JOSEPH M. SLABEY.

